Soil______is a natural process. It becomes a problem when human activity causes it to occur much faster than under natural condi

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问题 Soil______is a natural process. It becomes a problem when human activity causes it to occur much faster than under natural conditions.

选项 A、preservation
B、abrasion
C、erosion
D、eruption

答案C

解析 各项的意思是:preservation维护,保护;abrasion磨损处,擦伤处;erosion(水,风等的)侵蚀,腐蚀;eruption爆发,喷发,erupt into laughter突然大笑。
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